4k should add feature to remember the downloads from Youtube, so the latest videos can be downloaded if there is any addition to the playlist

Addition of videos to the playlist by the channel and then to select what was the last download and the added new videos is time consuming and headache....can 4k come out with feature to memorise the downloads from the playlists(even if the list is cleared from the application front end) and then update itself when a new download is initiated in the same playlist to avoid duplicates.